Schwarzenegger and Stallone unexpectedly reunite -- in the hospital

We gotta give it up to Arnold Schwarzenegger and Sylvester Stallone for all the crazy adventures they've led us through on the big screen, but when we saw them hanging out side by side at the hospital earlier today, we got a little worried and hoped it was a scene from their upcoming flick "The Tomb." But nope.

Schwarzenegger posted this photo via his WhoSay account and explained, "After all the action, stunts &physical abuse shooting The Expendables 2 and The Last Stand, it was time for a little tune up on my shoulder. Look who was coincidentally waiting in line behind me for his shoulder surgery. Now we're ready for another round of great times and action when we shoot The Tomb.#greattobeback"

It wasn't even planned! How funny.

Stallone and Schwarznegger will reunite in theaters for Mikael Hfstrm's film, which depicts Stallone playing an authority figure who must escape from a prison of his own design while Schwarzenegger will take on the role as one of the inmates.